selenium

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selenium

 [sĕ-le´ne-um]
a chemical element, atomic number 34, atomic weight 78.96, symbol Se. (See Appendix 6.) It is an essential mineral nutrient. Dietary sources of selenium include seafoods, kidney, and liver. Humans can adjust their homeostasis mechanism for selenium over a wide range of dietary intakes. Recommended intake levels are generally met from the diet, so that supplements are not necessary.
selenium sulfide
1. the sulfide salt of selenium, a topical antiseborrheic and antifungal applied topically to the scalp to control seborrheic dermatitis and dandruff; also used topically in the treatment of tinea versicolor.
2. the sulfide salt of selenium, an antiseborrheic and antifungal; used topically in the treatment of seborrheic dermatitis and dandruff of the scalp and of tinea versicolor.

se·le·ni·um (Se),

(sĕ-lē'nē-ŭm),
A metallic element chemically similar to sulfur, atomic no. 34, atomic wt. 78.96; an essential trace element toxic in large quantities that is required for glutathione peroxidase and a few other enzymes; 75Se (half-life equal to 119.78 days) is used in scintography of the pancreas and parathyroid glands.
[G. selēnē, moon]

selenium

A non-metallic element (atomic number 34; atomic weigh 8.96) that is required in trace amounts by certain enzymes (e.g., glutathione peroxidase); it interacts with vitamins A, C and E, serving as an antioxidant. Selenium is believed to be anticarcinogenic, to retard ageing, and has been used for arthritis, cataracts, connective tissue disease, dandruff and age-related vision loss.  

Sources
Brewer’s yeast, cereals, dairy products, fish, fruits, liver, organ and muscle meats, seafood, vegetables and whole grains.

se·le·ni·um

(sĕ-lē'nē-ŭm)
A metallic element chemically similar to sulfur; atomic no. 34, atomic wt. 78.96; an essential trace element toxic in large quantities; required for glutathione peroxidase and a few other enzymes; 75Se (half-life equal to 119.78 days) is used in scintography of the pancreas and parathyroid glands.
[G. selēnē, moon]

selenium

A trace element recently found to be an essential component of the enzyme deiodinase which catalyses the production of triiodothyronine (T3) from thyroxine (T4) in the thyroid gland. Selenium deficiency prevents the formation of T3.

se·le·ni·um

(sĕ-lē'nē-ŭm)
A metallic element used in scintography of pancreas and parathyroid glands.
[G. selēnē, moon]
References in periodicals archive ?
Acute selenium poisoning occurs when animals consume plants with a high selenium content.
The first recorded case of selenium poisoning was in 1857 in Nebraska.
Similar alterations have been described in chronic selenium poisoning in cattle (O'TOLLE & RAISBECK, 1995).